Lindeman P, Haglund M
Acta Otolaryngol. 1983 Jan-Feb;95(1-2):101-4. doi: 10.3109/00016488309130921.
The first systematically performed study concerning the size variation of the mastoid air cell system was measured on the X-ray film in a lateral projection, as exposed on the skull table. A new type of equipment (Orbix) with an isocentric motion of the roentgen tube and the film cassette and a different magnification, is gradually replacing the skull table. Temporal bone specimens were examined in a lateral projection using both equipments. The area of the mastoid air cell system was measured with a planimeter. A significant correlation was found between the areas obtained with the two techniques.
关于乳突气房系统大小变异的第一项系统性研究是在头颅摄影台上拍摄的侧位X线片上进行测量的。一种新型设备（Orbix），其X射线管和暗盒具有等中心运动且放大倍数不同，正在逐渐取代头颅摄影台。使用这两种设备对颞骨标本进行侧位检查。用求积仪测量乳突气房系统的面积。发现两种技术所测得的面积之间存在显著相关性。
